Method and apparatus for controlling power drawn from an energy converter
First Claim
1. A method of controlling power drawn from an energy converter by an energy transfer device to supply an AC load, where the energy converter is operable to convert physical energy into electrical energy, the method comprising changing by the energy transfer device the amount of power drawn from the energy converter when a supply voltage of the energy converter meets a criterion, said criterion and a change in the amount of power drawn from the energy converter being dependent upon a present amount of power supplied to the AC load;
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Abstract
Methods, apparatus, media and signals for controlling power drawn from an energy converter to supply a load, where the energy converter is operable to convert energy from a physical source into electrical energy. Power drawn from the energy converter is changed when a supply voltage of the energy converter meets a criterion. The criterion and the change in the amount of power drawn from the energy converter are dependent upon a present amount of power supplied to the load. The methods, apparatus, media and signals described herein may provide improvements to DC to AC maximum power point tracking in an energy conversion system such as a photovoltaic power generation system.
204 Citations
20 Claims
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1. A method of controlling power drawn from an energy converter by an energy transfer device to supply an AC load, where the energy converter is operable to convert physical energy into electrical energy, the method comprising changing by the energy transfer device the amount of power drawn from the energy converter when a supply voltage of the energy converter meets a criterion, said criterion and a change in the amount of power drawn from the energy converter being dependent upon a present amount of power supplied to the AC load;
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deeming said supply voltage to satisfy said criterion when said supply voltage is within a first range of voltage relative to a reference voltage, wherein said first range is dependent upon a trend in measured values of said supply voltage and upon a change in said supply voltage occurring after an increase in said power drawn from the energy converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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- 16. A method of controlling power drawn from an energy converter by an energy transfer device to supply an AC load, where the energy converter is operable to convert physical energy into electrical energy, the method comprising changing by the energy transfer device the amount of power drawn from the energy converter when a supply voltage of the energy converter meets a criterion, said criterion and a change in the amount of power drawn from the energy converter being dependent upon a present amount of power supplied to the AC load, deeming said supply voltage to satisfy said criterion when said supply voltage is within a first range of voltages relative to a reference voltage, and increasing said reference voltage when the change in the amount of power drawn from the energy converter results in a change in said supply voltage within a second range.
Specification